or The voice payload size can also be represented in terms of the codec samples. For example, a G.729 voice payload size of 20 ms
(two 10 ms codec samples) represents a voice payload of 20 bytes. Notice that the codec bit rate is always maintained: (20 bytes * 8)

/ (20 ms) = 8 Kbps

3) PPS = (codec bit rate) / (voice payload size)

PPS represents the number of packets that need to be transmitted every second in order to deliver the codec bit rate.

For example, for a G.729 call with voice payload size per packet of 20 bytes (160 bits), 50 packets need to be transmitted every

understand codec

G.729 is a high complexity algorithm, and G.729A (also known as G.729 Annex-A) is a medium complexity variant of G.729 with slightly lower voice quality. All platforms that support G.729 also support G.729A.

G.729 Annex-B is a high complexity algorithm, and G.729A Annex-B is a medium complexity variant of G.729 Annex-B with slightly lower voice quality.